Yao Qi ef713951c5 [arm] Fix displaced stepping for thumb alu reg instruction
Recent patch series "V2 All-stop on top of non-stop" causes a SIGSEGV
in the test case,

> -PASS: gdb.base/info-shared.exp: continue to breakpoint: library function #4
> +FAIL: gdb.base/info-shared.exp: continue to breakpoint: library function #4
>
> continue^M
> Continuing.^M
> ^M
> Program received signal SIGSEGV, Segmentation fault.^M
> 0x40021564 in ?? () gdb/testsuite/gdb.base/info-shared-solib1.so^M
> (gdb) FAIL: gdb.base/info-shared.exp: continue to breakpoint: library function #4

and an ARM displaced stepping bug is exposed.  It can be reproduced by
the modified gdb.arch/arm-disp-step.exp as below,

continue^M
Continuing.^M
^M
Program received signal SIGSEGV, Segmentation fault.^M
0xa713cfcc in ?? ()^M
(gdb) FAIL: gdb.arch/arm-disp-step.exp: continue to breakpoint: continue to test_add_rn_pc_end

This patch is to fix it.

gdb:

2015-04-10  Yao Qi  <yao.qi@linaro.org>

	* arm-tdep.c (install_alu_reg): Update comment.
	(thumb_copy_alu_reg): Remove local variable rn.  Update
	debugging message.  Use r2 instead of r1 in the modified
	instruction.

gdb/testsuite:

2015-04-10  Yao Qi  <yao.qi@linaro.org>

	* gdb.arch/arm-disp-step.S (main): Call test_add_rn_pc.
	(test_add_rn_pc): New function.
	* gdb.arch/arm-disp-step.exp (test_add_rn_pc): New proc.
	(top level): Invoke test_add_rn_pc.
2015-04-10 10:33:01 +01:00
2015-04-10 00:00:08 +00:00
2010-09-27 21:01:18 +00:00
2015-04-10 18:22:50 +09:30
2015-03-31 13:15:01 -07:00
2014-11-16 13:43:48 +01:00
2015-03-17 05:15:34 -07:00
2014-11-16 13:43:48 +01:00
2014-11-16 13:43:48 +01:00
2014-11-24 09:14:09 -08:00
2010-01-09 21:11:44 +00:00
2014-02-06 11:01:57 +01:00
2010-01-09 21:11:44 +00:00
2010-01-09 21:11:44 +00:00
2015-03-30 10:18:34 -07:00
2015-03-30 10:18:34 -07:00
2014-11-16 13:43:48 +01:00
2014-11-16 13:43:48 +01:00
2014-11-16 13:43:48 +01:00

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